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High-thermoplasticity foam polyester

A technology of thermoplastic polyester and plasticity, which is applied in the field of foamed polyester, can solve problems such as limiting application and affecting foam performance, and achieves the effects of stable foaming process, uniform cells, and improved process stability

Pending Publication Date: 2019-06-07
CHINA RESOURCES PACKAGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existence of the above problems will greatly affect the performance of the foam, limiting its application in rail transit, wind power, shipbuilding and construction industries

Method used

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  • High-thermoplasticity foam polyester
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  • High-thermoplasticity foam polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 100 parts by weight of PET, place it in a blast or vacuum oven, and bake it at 160°C for more than 4 hours to ensure that the moisture content is lower than 200ppm. Then mix it evenly with 1 part of attapulgite (Changzhou Dingbang Mineral Products, particle size 5um), 1 part of chain extender (1,3PBO, PMDA mixture), 0.8 part of antioxidant 1010, and add it to the serial two-stage screw extruder , the extrusion temperature from the conveying section to the homogenizing section is: 100°C, 100°C, 220°C, 248°C, 253°C, 258°C, 258°C, 258°C, 258°C, 258°C, 255°C. The temperature is 255°C, the screw speed is set to 70RPM, and the amount of foaming gas injected is 0.8kg / h. The driving force of the internal and external pressure difference formed by the rapid pressure relief of the die forms the bubble nucleus hot spot and the foam grows and forms, and then the rapid cooling and shaping part , traction part, cutting part and winding and stacking part to obtain thermoplastic ...

Embodiment 2

[0039] Weigh 100 parts by weight of PET, place it in a blast or vacuum oven, and bake it at 160°C for more than 4 hours to ensure that the moisture content is lower than 200ppm. Then mix evenly with 1 part of sepiolite (Tuoyi new material, particle size 5um), 1 part of chain extender (1,3PBO, PMDA mixture), 0.8 part of antioxidant 1010, and add it to the serial two-stage screw extruder , the extrusion temperature from the conveying section to the homogenizing section is: 100°C, 100°C, 220°C, 248°C, 253°C, 258°C, 258°C, 258°C, 258°C, 258°C, 255°C. The temperature is 255°C, the screw speed is set to 70RPM, and the amount of foaming gas injected is 0.8kg / h. The driving force of the internal and external pressure difference formed by the rapid pressure relief of the die forms the bubble nucleus hot spot and the foam grows and forms, and then the rapid cooling and shaping part , traction part, cutting part and winding and stacking part to obtain thermoplastic polyester foam materia...

Embodiment 3

[0043] Weigh 100 parts by weight of PET, place it in a blast or vacuum oven, and bake it at 160°C for more than 4 hours to ensure that the moisture content is lower than 200ppm. Then mix evenly with 1 part of wollastonite powder (Jingcheng Chemical Industry, particle size 5um), 1 part of chain extender (1,3PBO, PMDA mixture), 0.8 part of antioxidant 1010, and add to the serial two-stage screw extruder Among them, the extrusion temperature from the conveying section to the homogenizing section is: 100°C, 100°C, 220°C, 248°C, 253°C, 258°C, 258°C, 258°C, 258°C, 258°C, 255°C. The temperature is 255°C, the screw speed is set to 70RPM, and the amount of foaming gas injected is 0.8kg / h. The driving force of the internal and external pressure difference formed by the rapid pressure relief of the die forms the bubble nucleus hot spot and the foam grows and forms, and then undergoes rapid cooling and shaping Part, traction part, cutting part and winding and stacking part to get thermopl...

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Abstract

The invention relates to a high-thermoplasticity foam polyester. A preparation method of the foam polyester is characterized by comprising the steps of uniformly mixing 0.1-2 parts by weight of a needle-like structural nucleating agent, 0.1-2 parts by weight of a chain extender, 0.1-2 parts by weight of an antioxidant and 100 parts by weight of a thermoplastic polyester and performing foaming to prepare the foam polyester, wherein the needle-like structural nucleating agent is attapulgite, sepiolite, wollastonite, diopside, tremolite, crystal whiskers or other needle-like structural powder, the needle-like structural powder nucleating agent preferably has a length-diameter ratio of 3-100 and a diameter of 0.1-100 [mu]m, and the thermoplastic polyester has viscosity of 0.60-1.20 dL / g. The foam polyester provided by the invention has the advantages of a uniform and fine foam pore structure and excellent mechanical properties.

Description

technical field [0001] The invention relates to a foamed polyester, in particular to a high thermoplastic foamed polyester. Background technique [0002] Polyester foamed products are made by mixing foamable polyester with nucleating agent, chain extender, antioxidant, etc. in proportion, using serial two-stage screw physical blending, introducing foaming gas and dissolving in the polymer in the melt. The driving force of the internal and external pressure difference formed by the rapid pressure relief of the die forms the bubble nucleus hot spot and the foam grows into shape, and then the rapid cooling of the shaping part, traction part, cutting part and winding and stacking part achieves a stable foaming process and uniform cells Foaming material with fine density, controllable expansion ratio and excellent mechanical properties. The thermoplastic polyester foam material is divided into sheet and plate. The sheet is mainly used in food packaging and other fields, and the...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K3/34C08K7/08C08J9/00
Inventor 柳祚龙施文照胡广君李亚飞韦景然朱振达
Owner CHINA RESOURCES PACKAGING MATERIALS CO LTD
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